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- A pure substance = a single element or compound, not mixed with any other substance
pmt.physicsandmathstutor.com/download/Chemistry/GCSE/Notes/Edexcel/2-States-of-Matter-and-Mixtures/Set-A/2.2. Methods of separating and purifying substances.pdfEdexcel GCSE Chemistry Topic 2: States of matter and mixtures
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In a mixture, the two ingredients can be separated using physical processes, without chemical reactions. This is because they are not chemically bonded together. Here are some examples:
a pure substance consists only of one element or one compound; a mixture consists of two or more different substances, not chemically joined together
substance is a single element or compound not mixed with any other substance. A. mixture. Two or more substances that are not joined together and not chemically combined. They are...
Key learning points. A mixture consists of two or more elements and/or compounds, not chemically combined together. Chemical properties of each substance in a mixture remain unchanged. There are multiple physical processes for separating mixtures.
2.5 Explain the difference between the use of ‘pure’ in chemistry compared with its everyday use and the differences in chemistry between a pure substance and a mixture. A mixture: Consists of 2 or more elements or compounds not chemically combined together.
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A mixture consists of two or more elements/compounds, that are not chemically combined together and can be separated by physical processes. A pure substance is either a single element, or compound, that is not mixed with any other substance.
A mixture is made up of two or more substances that are not chemically combined together. Although the substances mix, they do not react with each other. So, we can easily separate the substances in the mixtures using physical methods, such as: Filtration. Crystallisation. Simple distillation.
